Sqoop argument "--columns" causes NullPointerException if case is not correct for Oracle

(1) Perform a sqoop import for an oracle table and specify the column names via the "--columns" argument:
sqoop import --connect jdbc:oracle:thin:@<server>:<port>:<service> --username <user> --password <password> --table table5 --split-by col_number --columns "col_number" --verbose

(2)
The following error is encountered:
10/08/02 14:17:28 INFO tool.CodeGenTool: Beginning code generation
10/08/02 14:17:28 DEBUG manager.OracleManager: Creating a new connection for jdbc:oracle:thin:@machine:port:service/user
10/08/02 14:17:29 INFO manager.OracleManager: Time zone has been set to GMT
10/08/02 14:17:29 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM table5 t WHERE 1=0
10/08/02 14:17:29 DEBUG orm.ClassWriter: selected columns:
10/08/02 14:17:29 DEBUG orm.ClassWriter: col_number

10/08/02 14:17:29 ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.NullPointerException
java.lang.NullPointerException
at com.cloudera.sqoop.orm.ClassWriter.generateFields(ClassWriter.java:430)
at com.cloudera.sqoop.orm.ClassWriter.generateClassForColumns(ClassWriter.java:1081)
at com.cloudera.sqoop.orm.ClassWriter.generate(ClassWriter.java:955)
at com.cloudera.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:82)
at com.cloudera.sqoop.tool.ImportTool.importTable(ImportTool.java:85)
at com.cloudera.sqoop.tool.ImportTool.run(ImportTool.java:161)
at com.cloudera.sqoop.Sqoop.run(Sqoop.java:134)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at com.cloudera.sqoop.Sqoop.runSqoop(Sqoop.java:170)
at com.cloudera.sqoop.Sqoop.runTool(Sqoop.java:196)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:205)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.hadoop.util.RunJar.main(RunJar.java:186)

The problem is that during ClassWriter.generate(), the "cleaned" column names do not retain their column type.
i.e. The 2nd parameter in this call is null...
columnTypes.put(identifier, columnTypes.get(col));

This is not a problem if the correct case for the column name is used on the sqoop command-line.
i.e. Oracle column names are actually upper-case by default.